4Cr5MoSiV T23430 - GB /T 1299-2025

4Cr5MoSiV Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Cu	Mo	V	More
Minimum Value	0.33	0.8	0.2	-	-	4.75	-	1.1	0.3	Cu+Ni≤0.55
Maximum Value	0.43	1.2	0.5	0.025	0.02	5.5	0.25	1.6	0.6	Cu+Ni≤0.55

• Smelting method: Vacuum degassing

4Cr5MoSiV Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
Delivery condition	Annealing	≤229
Specimen	Preheat to 790 ± 15 ℃, 1020 ℃(controllable atmosphere) ± 6℃ or Heat at 1010 ℃(salt bath), hold for 5 to 15 min, then cool in oil. Temper at 550 ±6 ℃ twice, each time for 2 h	①

New and Old Grade Replacement List

1 Approximate Comparison Table Plastic Mold Steel

China	Japan	United States	International Organization for Standardization	Germany		Sweden
GB	JIS	ASTM	ISO	DIN EN/DIN	W-Nr.	SS
4Cr5MoSiV	SKD 61	H13	40CrMoV 5	X40CrMoV 5-1	1.2344	8407

2 Approximate Comparison Table Hot Work Tool Steel

China		Japan	United States	International Organization for Standardization
GB	ISC	JIS	ASTM	ISO
4Cr5MoSiV	T23352	SKD 6	H11	X37CrMoV 5-1

3 Approximate Comparison Table Hot-Work Tool Steels

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	BS EN/BS
4Cr5MoSiV	SKD6	H11	X37CrMoV5-1	X38CrMoV5-1	Z38CDV5	X37CrMoV5-1	1.2343	4KH5MFS	BH11

4 Approximate Comparison Table Alloy Tool Steel

China	Japan	South Korea	United States	International Organization for Standardization	Germany	United Kingdom
GB	JIS	KS	ASTM/AISI	ISO	DIN EN/DIN	BS EN/BS
4Cr5MoSiV	SKD6	STD6	H11	35CrMoV5	X38CrMoV5-1	BH11

5 Approximate Comparison Table Alloy Tool Steel 2

4Cr5MoSiV Corresponding Standards(Same grade name, different standards)

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